package com.example.paranoid.createw;

import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private Button btnStartB;
    private long lastPressTime =0;
    private final String TAG ="MainActivity";


    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.e(TAG,"onCreate");

        btnStartB = findViewById(R.id.btn_start_b);
        btnStartB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this,ActivityB.class);
                startActivity(intent);

            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.e(TAG,"onStart");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.e(TAG,"onRestart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.e(TAG,"onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.e(TAG,"onPause");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.e(TAG,"onDestroy");
    }

    public void onBackPressed() {
        long currentPressTime =System.currentTimeMillis();

        if(currentPressTime-lastPressTime>=2000){
            lastPressTime=currentPressTime;
            Toast.makeText(MainActivity.this,"再按一次退出",
                    Toast.LENGTH_SHORT).show();
        }else{


            super.onBackPressed(); }
    }
}
